An Anonymous Authentication Protocol Based on Cloud for Telemedical Systems

Table 1

Comparisons of properties.

	Chen et al.’s [15]	Chiou et al.’s [16]	Cheng et al.’s [20]	Ours
Resistance of impersonation attack	Yes	Yes	Yes	Yes
Prevention of replay attack	Yes	Yes	Yes	Yes
Preserving patient privacy	No	Yes	No	Yes
Complete mutual authentication	No	No	No	Yes
Perfect forward secrecy	Yes	Yes	Yes	Yes
Confidentiality	Yes	Yes	No	Yes
Perfect backward secrecy	Yes	Yes	Yes	Yes